使用Newtonsoft Json如何将int值转换为字符串
使用Newtonsoft Json如何将int值转换为字符串
提问于 2021-12-20 19:30:03
我刚刚开始检查如何在需要使用ArangoDB的项目中使用json来序列化和反序列化。
目前，我有一个测试类AnoherTestPerson
public class AnotherTestPerson
{
public AnotherTestPerson(int id, string fullname, int age)
{
this.Id = id;
this.Fullname = fullname;
this.Age = age;
}
public int Id { get; set; }
public string Fullname { get; set; }
public int Age { get; set; }
}现在，我需要将Id值转换为字符串，因为当您将数字值作为_key传递时，_key无法工作，所以我猜我必须从Arango驱动程序使用的序列化程序中进行转换，因为在我将要处理的项目中，我们将无法访问我们想要存储在数据库上的实体的类。
任何帮助都将不胜感激，因为我仍在学习如何使用Json和C#进行序列化。
下面是其余的代码：
public static async Task Main(string[] args)
{
string connectionString = "private";
var arango = new ArangoContext(cs:connectionString, settings:
new ArangoConfiguration
{
Serializer = new ArangoNewtonsoftSerializer(CustomDataContractResolver.Instance)
//Using custom contract resolver for automatically changing the Id name
//from the object class to _key in the Json file
}
);
await arango.Document.CreateAsync("TestDB", typeof(AnotherTestPerson).Name, testPerson);
}这是定制的合同解析器。我试着改变了这里的房产类型，但没起作用。
public class CustomDataContractResolver : DefaultContractResolver
{
public static readonly CustomDataContractResolver Instance = new CustomDataContractResolver();
protected override JsonProperty CreateProperty(MemberInfo member, MemberSerialization memberSerialization)
{
var property = base.CreateProperty(member, memberSerialization);
if (property.PropertyName.Equals("Id", StringComparison.OrdinalIgnoreCase))
{
property.PropertyName = "_key";
if(property.PropertyType == Type.GetType("System.Int32"))
{
property.PropertyType = Type.GetType("System.String");
}
}
return property;
}
}编辑
因此，通过检查SBFrancies的注释，我实现了一个基本的JsonConverter：
public class ToStringJsonConverted : Newtonsoft.Json.JsonConverter
{
public static readonly ToStringJsonConverted Instance = new ToStringJsonConverted();
public override bool CanConvert(Type objectType)
{
return true;
}
public override object? ReadJson(JsonReader reader, Type objectType, object? existingValue, JsonSerializer serializer)
{
throw new NotImplementedException();
}
public override void WriteJson(JsonWriter writer, object? value, JsonSerializer serializer)
{
writer.WriteValue(value.ToString());
}
}并将其链接到自定义ContractResolver：
public class CustomDataContractResolver : DefaultContractResolver
{
public static readonly CustomDataContractResolver Instance = new CustomDataContractResolver();
protected override JsonProperty CreateProperty(MemberInfo member, MemberSerialization memberSerialization)
{
var property = base.CreateProperty(member, memberSerialization);
if (property.PropertyName.Equals("Id", StringComparison.OrdinalIgnoreCase))
{
property.PropertyName = "_key";
if(property.PropertyType == Type.GetType("System.Int32"))
{
property.Converter = ToStringJsonConverted.Instance;
}
}
return property;
}
}它按我的意愿序列化，但反序列化现在不起作用。现在，我将检查如何读取Json文件并解析它们。
回答 1
Stack Overflow用户
发布于 2021-12-20 21:18:44
我得到了序列化和反序列化工作，并在注释中的@SBFrancies提供了帮助。
ContractResolver：
public class CustomDataContractResolver : DefaultContractResolver
{
public static readonly CustomDataContractResolver Instance = new CustomDataContractResolver();
protected override JsonProperty CreateProperty(MemberInfo member, MemberSerialization memberSerialization)
{
var property = base.CreateProperty(member, memberSerialization);
if (property.PropertyName.Equals("Id", StringComparison.OrdinalIgnoreCase))
{
property.PropertyName = "_key";
if(property.PropertyType == Type.GetType("System.Int32"))
{
property.Converter = ToStringJsonConverted.Instance;
}
}
return property;
}
}JsonConverter：
public class ToStringJsonConverted : Newtonsoft.Json.JsonConverter
{
public static readonly ToStringJsonConverted Instance = new ToStringJsonConverted();
public override bool CanConvert(Type objectType)
{
return true;
}
public override object? ReadJson(JsonReader reader, Type objectType, object? existingValue, JsonSerializer serializer)
{
return Int32.Parse((string)reader.Value);
}
public override void WriteJson(JsonWriter writer, object? value, JsonSerializer serializer)
{
writer.WriteValue(value.ToString());
}
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/70427032
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